#include <iostream>
#include <fstream>
using namespace std;


void writeLine(ifstream& filein, ofstream& out);

int main() {
    char* file1;
    char* file2;
    char* file3;
    
    cout << "ÀÐÀ» ÆÄÀÏÀ̸§: ";
    cin >> file1;
    cout << "µÎ¹ø° ÀÐÀ» ÆÄÀÏÀ̸§: ";
    cin >> file2;
    cout << "Ãâ·ÂÇÒ ÆÄÀÏÀ̸§: ";
    cin >> file3;
    
    ifstream filein1(file1);
    ifstream filein2(file2);
    ofstream fileout(file3);
    
    if (!filein1.is_open() || !filein2.is_open()) {
	cout << "ÆÄÀÏÀ» ¿­ ¼ö ¾ø½À´Ï´Ù.";
	exit(EXIT_FAILURE);
    }
    
    while (filein1.good() && filein2.good()) {
	if (!filein1.eof()) {
	    writeLine(filein1, fileout);
	}
	if (!filein2.eof()) {
	    writeLine(filein2, fileout);
	}
    }
    
    filein1.close();
    filein2.close();
    fileout.close();
}

void writeLine(ifstream& filein, ofstream& out) {
    char data;
    if (filein.fail())
	return;
    do {
	filein.read((char*) &data, sizeof data);
	out.write((char*) &data, sizeof data);
    } while (data != '\n');
}